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One of the Lewis Chessmen - currently on display at the National Museum of Scotland in Edinburgh.
(lemmy.world)
Found in 1831 on a beach at Uig on the Isle of Lewis in the Outer Hebrides, the Chessmen dates to the late 12th or early 13th century.
That’s a berserker, an early chess piece that could move like a queen and knight combined, three times at once, and captured everything within a three-square radius. For obvious reasons, it was soon replaced by pieces with more reasonable restrictions.
I heard they tried nerfing it, by letting it die after his first turn, but it was still way to op.